In precombustion chamber in diesel engine________________?

Related Mcqs:

1. In a typical medium speed 4-stroke cycle diesel engine________________?

   A. compression starts at 35° after bottom dead center and ends at top dead center
   B. compression starts at bottom dead center and ends at top dead center
   C. compression starts at 10° before bottom dead center and, ends just before top dead center
   D. may start and end anywhere
   E. none of the above

2. In open combustion chamber in diesel engines____________________?

   A. the shape and layout of the piston crown, the inlet port, and the valve produce the turbulent effect on fuel mixture
   B. fuel is injected into an auxiliary chamber that is separated from the cylinder by an orifice or throat
   C. only a part of air charge is contained in an auxiliary chamber in which the fuel starts to burn with insufficient air which due to explosion tendency mixes thoroughly into main cylinder charge
   D. fuel is injected at atmospheric pres¬sure
   E. there are no valves.

3. In turbulence chamber in diesel engine__________________?

   A. the shape and layout of the piston crown, the inlet port, and the valve produce the turbulent effect of fuel mixture
   B. fuel is injected into an auxiliary chamber that is separated from the cylinder by an orifice or throat
   C. only a part of air charge is contained in an auxiliary chamber in which the fuel starts to burn with insufficient air which due to explosion tendency mixes thoroughly into main cylinder charge
   D. there are no valves
   E. fuel is partly burnt by spark

4. In the opposed piston diesel engine, the combustion chamber is located________________?

   A. above the piston (/;) below the piston
   C. between the pistons
   D. any when
   E. there is no such criterion

5. High carbon content in diesel oil used for diesel engine leads to_________________?

   A. production of highly corrosive gases corroding the cylinder walls and exhaust system
   B. excessive engine wear
   C. damaging of both the storage tank and the engine
   D. deposition on engine parts
   E. none of the above.

6. In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of____________________?

   A. 250°C
   B. 500°C
   C. 1000°C
   D. 150CPC
   E. 2000°C

7. In carburettors, the top of the fuel jet with reference to the level in the float chamber is kept at_________________?

   A. same level
   B. slightly higher level
   C. slightly lower level
   D. may be anywhere
   E. varies from situation to situation

8. The basic requirement of a good combustion chamber is___________________?

   A. high compression ratio
   B. low compression ratio
   C. low volumetric efficiency
   D. minimum turbulence
   E. high power output and high thermal efficiency

9. Carbon residue in diesel oil should not be more than___________________?

   A. 1%
   B. 0.5%
   C. 0.1%
   D. 0.01%
   E. 0.001%

10. Sulphur content in diesel oil should not be more than_________________?

    A. 10%
    B. 5%
    C. 1%
    D. 0.1%
    E. 0.01%